#include<stdio.h>double PI=3.1415926;//这个必须是这个数int main(){int t,year,i=0;double x,y,area;scanf("%d",&t);while(t--){i++;scanf("%lf%lf",&x,&y);area=PI*(x*x+y*y)/2.0;//求出平均面积year=(int)(area/50.0);//注意